Asynctaskランタイム許可で複数回ロードする

Question

私はアンドロイドで初心者です.Marshmallow（NearLocations.execute（））でランタイム権限を付与した後、特定の非同期タスクを呼び出そうとしていますが、許可する）私の非同期タスクは複数回呼び出しており、進行状況バーは読み込み中です。この問題を解決するにはどうすればよいですか？

public class DashViewScreen extends Fragment implements OnRefreshListener { 
    public static final int MULTIPLE_PERMISSIONS = 10; // code you want. 
    String[] permissions = new String[] { 
      Manifest.permission.ACCESS_COARSE_LOCATION, 
      Manifest.permission.ACCESS_FINE_LOCATION }; 
    Location mLocation; 
    View v1; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     v = inflater.inflate(R.layout.dashboard_layout, container, false); 
     initialUISetup(); 
     Toast.makeText(getActivity(), "Oncreate", Toast.LENGTH_SHORT).show(); 
     checkPermission(getActivity()); 
     return v; 
    } 

    @SuppressWarnings("deprecation") 
    public void initialUISetup() { 
     //Async task one 
     mTask = new Information(v, false); 
     mTask.execute(); 
    } 

    private class Information extends AsyncTask<Void, Void, Object> { 
     private ProgressDialog mProgressDialog; 
     private View v1; 

     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 
      Toast.makeText(getActivity(), "Retrieve Acc", Toast.LENGTH_SHORT).show(); 
      mTask = null; 
     } 

     @Override 
     protected Object doInBackground(Void... params) { 
      AccountInformation results = null; 
      results = AppUtil.drex.AccountInformation(v1.getContext()); 
      return results; 
     } 

     @Override 
     protected void onPostExecute(Object result) { 
      super.onPostExecute(result); 
      mAccInfo = (AccountInformation) result; 
      //Async task two 
      mTask = new Messages().execute(); 
     } 
    } 

    private boolean checkPermission(Activity act) { 
     int result; 
     List<String> listPermissionsNeeded = new ArrayList<>(); 
     for (String p : permissions) { 

      result = ContextCompat.checkSelfPermission(act, p); 
      if (result != PackageManager.PERMISSION_GRANTED) { 
       listPermissionsNeeded.add(p); 
      } else { 
       if (lastLocation == null) { 
        locationManager = (LocationManager) v.getContext() 
          .getSystemService(Context.LOCATION_SERVICE); 

        gpsLocationListener = createListener(v); 
        locationManager.requestLocationUpdates(
          LocationManager.GPS_PROVIDER, 0, 0, 
          gpsLocationListener); 
       } 
       //Async three 
       new NearLocations(lastLocation, v).execute(); 
      } 
     } 
     if (!listPermissionsNeeded.isEmpty()) { 

      requestPermissions(
        listPermissionsNeeded.toArray(new String[listPermissionsNeeded 
          .size()]), MULTIPLE_PERMISSIONS); 

      return false; 
     } 
     return true; 
    } 

    @Override 
    public void onRequestPermissionsResult(int requestCode, 
      String[] permissions, int[] grantResults) { 
     // TODO Auto-generated method stub 
     switch (requestCode) { 
      case MULTIPLE_PERMISSIONS: { 
       if (grantResults.length > 0 
         && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 

        lastLocation = AppUtil.getMyLastLocation(v.getContext()); 

        if (lastLocation == null) { 
         locationManager = (LocationManager) v.getContext() 
           .getSystemService(Context.LOCATION_SERVICE); 

         lastLocation = AppUtil.getBestLocation(v.getContext(), 
           locationManager); 

         gpsLocationListener = createListener(v); 
         locationManager.requestLocationUpdates(
           LocationManager.GPS_PROVIDER, 0, 0, 
           gpsLocationListener); 
        } 
        new NearLocations(lastLocation, v).execute(); 
       } else { 
        AppUtil.saveBoolToPrefs(getActivity(), "stopPopup", true); 
       } 
       return; 
      } 
     } 
     super.onRequestPermissionsResult(requestCode, permissions, grantResults); 
    }  
} 

Answer 1

私はコードを読みましたが、すべてを理解できませんでした。 クラスを非同期タスクのように実行しています。私はそれを好む。

public abstract class AsyncTaskSubhi { 

Activity activity; 
MaterialDialog dialog; 
String processName; 
public AsyncTaskSubhi(Activity activity, String processName) { 
    this.activity = activity; 
    this.processName=processName; 
} 


public void onPreExecute() { 
    dialog= new MaterialDialog.Builder(activity) 
      .title("*****") 
      .content(processName+"is running").cancelable(false) 
      .progress(true, 0).autoDismiss(false) 
      .show(); 
} 

public abstract void doInBackground(); 

public void execute() { 
    try { 
     new Thread(new Runnable() { 
      @Override 
      public void run() { 
       if (activity != null) 
        activity.runOnUiThread(new Runnable() { 
         @Override 
         public void run() { 
          onPreExecute(); 
         } 
        }); 

       doInBackground(); 

       if (activity != null) 
        activity.runOnUiThread(new Runnable() { 
         @Override 
         public void run() { 
          onPostExecute(); 
         } 
        }); 

      } 
     }).start(); 

    }catch (Exception e){ 
     dialog.dismiss(); 
    } 


} 
public void onPostExecute() { 
    dialog.dismiss(); 
    new MaterialDialog.Builder(activity) 
      .title("*****") 
      .content("OK") 
      .positiveText(R.string.ok).show(); 
} 

}

Answer 2

for (String p : permissions) { 
    result = ContextCompat.checkSelfPermission(act, p); 
    if (result != PackageManager.PERMISSION_GRANTED) { 
     listPermissionsNeeded.add(p); 
    } else { 
     if (lastLocation == null) { 
      locationManager = (LocationManager) v.getContext() 
           .getSystemService(Context.LOCATION_SERVICE); 

      gpsLocationListener = createListener(v); 
      locationManager.requestLocationUpdates(
           LocationManager.GPS_PROVIDER, 0, 0, 
           gpsLocationListener); 
      } 
      //Async three 
      //it will be executed PackageManager.PERMISSION_GRANTED is true put log where how many time it is executed 
        new NearLocations(lastLocation, v).execute(); 
    } 
} 

は

for (String p : permissions) { 
      result = ContextCompat.checkSelfPermission(act, p); 
      if (result != PackageManager.PERMISSION_GRANTED) { 
       listPermissionsNeeded.add(p); 
      } else { 
       if (lastLocation == null) { 
        locationManager = (LocationManager) v.getContext() 
          .getSystemService(Context.LOCATION_SERVICE); 

        gpsLocationListener = createListener(v); 
        locationManager.requestLocationUpdates(
          LocationManager.GPS_PROVIDER, 0, 0, 
          gpsLocationListener); 
       } 
      } 
     } 

     if (!listPermissionsNeeded.isEmpty()) { 
      requestPermissions(
        listPermissionsNeeded.toArray(new String[listPermissionsNeeded 
          .size()]), MULTIPLE_PERMISSIONS); 
      return false; 
     }else { 
      new NearLocations(lastLocation, v).execute(); 
     } 

Answer 3

あなたのAsyncTask.execute（）を呼び出していると、このコードを削除してください：で、forループで

 new NearLocations(lastLocation, v).execute(); 

をあなたのcheckPermission（）メソッド：すべての権限w HICHは、すでに付与されます。

 for (String p : permissions) { 

     result = ContextCompat.checkSelfPermission(act, p); 
     if (result != PackageManager.PERMISSION_GRANTED) { 
      listPermissionsNeeded.add(p); 
     } else { 
      if (lastLocation == null) { 
       locationManager = (LocationManager) v.getContext() 
         .getSystemService(Context.LOCATION_SERVICE); 

       gpsLocationListener = createListener(v); 
       locationManager.requestLocationUpdates(
         LocationManager.GPS_PROVIDER, 0, 0, 
         gpsLocationListener); 
      } 
      //Async three 
      new NearLocations(lastLocation, v).execute(); 
     } 
    } 

その後、再びAsyncTaskの複数の呼び出しを引き起こしているonRequestPermissionsResult（）、それを呼び出します。